CN104968114B - Long-distance LED lamp light modulation circuit through controllable rectification - Google Patents
Long-distance LED lamp light modulation circuit through controllable rectification Download PDFInfo
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- CN104968114B CN104968114B CN201510387103.2A CN201510387103A CN104968114B CN 104968114 B CN104968114 B CN 104968114B CN 201510387103 A CN201510387103 A CN 201510387103A CN 104968114 B CN104968114 B CN 104968114B
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Abstract
A long-distance LED lamp light modulation circuit through controllable rectification includes a rectification control unit and an LED lamp brightness adjusting unit. The rectification control unit includes a control power supply module, a controllable rectification module, a zero-crossing detection module, a single-chip microcomputer control module, a trigger control module and a brightness giving module. A single-phase 220V AC power supply is input, and a controllable rectification voltage with a brightness control signal is output. The LED lamp brightness adjusting unit includes an adjusting power supply module, a waveform sampling module, a single-chip microcomputer adjusting module and an LED driving module. The controllable rectification voltage with the brightness control signal is input to control the brightness of an LED lamp. The light modulation circuit does not need a remote controller, a control line needs not to be laid additionally, a single-phase power line is directly utilized to transmit the brightness control signal, and the brightness of the LED lamp can be controlled and adjusted in a remote manner.
Description
Technical field
The present invention relates to a kind of lighting technology, especially a kind of controlled rectification remote LED lamp light adjusting circuit.
Background technology
Due to the nonlinear characteristic of LED, the brightness of LED can not be realized by the way of voltage is adjusted.
When adjusting the brightness of LED using controllable constant-current source, the change of operating current can bring the chromatogram of LED inclined
Move, meanwhile, under low-light level, LED load current also becomes very low, increases can the reduction of controllable constant-current source efficiency and temperature rise, be lost
Power consumption on driving chip is bigger, so as to damage the life-span of constant-current source and LED/light source.
LED brightness is controlled using PWM (pulsewidth modulation) dimming mode, voltage regulating mode can be avoided and current system band is adjusted
The problem come.Conventional LED light-dimming method has three kinds at present：
One is to adopt remote control control.LED control circuit is equipped with remote control device, can pass through remote control pair
LED has carried out level light modulation or stepless dimming, and which has the disadvantage that a LED needs to be equipped with a remote control, causes remote control
Device quantity is more, and management trouble, cost are also higher.
Two is to adopt digital control technology.For example, using DALI (lighting interface of digital address) technology, DALI systems
Software same forceful electric power loop or the single or multiple LED lamps on different circuit can be carried out it is separately addressed, by DALI systems
Software is accurately dimmed and switch control rule to single lamp or arbitrary lamp group.Program advanced technology, but cost is very high, system
In addition to needing to lay power line, in addition it is also necessary to lay control line.
Three is using single live wire switch on and off control technology.For example, using NU102 special chips, you can using common wall
Switch motion of the face switch within the time of regulation, realizes the brightness regulation of LED.But the method can only provide 4 grades of LEDs
Brightness is adjusted, and switch motion has time requirement.
The content of the invention
The purpose of the present invention aims to provide one kind in the case where not increasing control signal wire and not using remote control, utilizes
The circuit dimmed to LED by single phase poaer supply line.
For reaching above-mentioned purpose, the present invention is adopted the technical scheme that：
A kind of controlled rectification remote LED lamp light adjusting circuit, by Commutation control unit and LED brightness adjusting unit group
Into.
The Commutation control unit be provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal,
Two controlled rectification lead-out terminals；The phase line input terminal, zero line input terminal input single-phase 220V AC powers；Described first
Controlled rectification lead-out terminal, the second controlled rectification lead-out terminal output controlled rectification voltage.
The LED brightness adjusting unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, institute
State the first controlled rectification input terminal, the second controlled rectification input terminal and be respectively connecting to the first controllable whole of Commutation control unit
Stream lead-out terminal, the second controlled rectification lead-out terminal.
The Commutation control unit is by controlling power module, controllable rectifier module, zero passage detection module, Single-chip Controlling mould
Block, trigger control module, the given module composition of brightness.
The control power module input single-phase 220V AC powers, the first DC supply of output, by control power supply
Single-phase rectification bridge and the first filter regulator circuit composition；The rectification negative polarity end for controlling power supply single-phase rectification bridge is public
Ground.First DC supply is powered to single chip control module.
The controllable rectifier module is by rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, double
Constitute to IGCT V4；2 ac input ends of the rectifier bridge UR1 are respectively connecting to phase line input terminal and zero line input
Son, rectification output plus terminal are connected to the second plate of bidirectional thyristor V3, and rectification output negative terminal is connected to bidirectional thyristor V4's
Second plate；First is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3 controllable whole
Stream lead-out terminal；The second plate of bidirectional thyristor V1 is connected to phase line input terminal；The first anode of bidirectional thyristor V2 with
The second controlled rectification lead-out terminal is connected to after the first anode parallel connection of bidirectional thyristor V4；The second plate of bidirectional thyristor V2
It is connected to zero line input terminal.
The trigger control module is provided with exchange control signal, rectification control signal；The exchange control signal
When the AC controling signal of input is effective, trigger when trigger control module control bidirectional thyristor V1 and bidirectional thyristor V2 zero passages
Conducting；When the AC controling signal of the exchange control signal input is invalid, trigger control module control bidirectional thyristor V1
End with after bidirectional thyristor V2 zero passages；When the rectification control signal of the rectification control signal input is effective, triggering control
Module controls triggering and conducting when bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；The rectification of the rectification control signal input
When control signal is invalid, end after trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passages.
The zero passage detection module is provided with zero passage voltage input, zero-crossing pulse output end；The zero passage voltage input
It is connected to phase line input terminal；The zero-crossing pulse of the zero-crossing pulse output end output is positive pulse；The zero-crossing pulse with it is whole
The single-phase 220V AC powers positive half-wave correspondence of flow control unit input；The width of the zero-crossing pulse is exchanged less than single-phase 220V
Power supply positive half-wave width.
The given module of the brightness is provided with brightness Setting signal output end.
The given module of the brightness is BCD rotary encoders, and the brightness Setting signal is that BCD is encoded.
The single chip control module includes brightness Setting signal input, signal acquisition input and two-way level letter
Number output end；The brightness Setting signal input is connected to the brightness Setting signal output end of the given module of brightness；It is described to catch
Catch the zero-crossing pulse output end that signal input part is connected to zero passage detection module；The two-way level signal output end is respectively handed over
Flow control output end, rectification control output end；The exchange control output end, rectification control output end are respectively connecting to triggering control
The exchange control signal of molding block, rectification control signal.
The LED brightness adjusting unit is driven by regulation power supply module, waveform sampling module, single-chip microcomputer adjustment module, LED
Dynamic model block is constituted.
The regulation power supply module input controlled rectification voltage, the second DC supply of output, it is single-phase by regulation power supply
Rectifier bridge and the second filter regulator circuit composition；The rectification negative polarity end of the regulation power supply single-phase rectification bridge is reference ground.Institute
State regulation power supply module to power to single-chip microcomputer adjustment module.
The waveform sampling module is provided with sampling Waveform Input end and sampling pulse output end；The sampling Waveform Input end
It is connected to the first controlled rectification input terminal；First controlled rectification input terminal current potential is higher than second by the waveform sampling module
Simultaneously amplitude limit obtains sampling pulse for the waveform detection of controlled rectification input terminal current potential；The positive pulse of the sampling pulse and first can
Control rectification input terminal current potential is corresponding higher than the waveform of the second controlled rectification input terminal current potential.
The single-chip microcomputer adjustment module has seizure input and pwm pulse output end, catches input and is connected to waveform
The sampling pulse output end of sampling module.
The LED drive module is used for driving LED to light, and is provided with PWM brightness regulated signal inputs；The PWM is bright
Degree Regulate signal input is connected to the pwm pulse output end of single-chip microcomputer adjustment module；The input direct-current of the LED drive module
Upper voltage limit is more than 300V.
The Commutation control unit sends difference by continuous rectified waveform periodicity in control controlled rectification voltage
The brightness control signal of brightness degree.
In the brightness control signal, brightness degree is represented with continuous rectified waveform periodicity.
The LED brightness adjusting unit receives brightness control signal adjusting brightness of LED lamps in controlled rectification voltage.
The invention has the beneficial effects as follows, single phase poaer supply line far distance controlled LED brightness is directly adopted, without the need for remote control,
Without the need for control line；LED brightness regulation can divide multiple gears, with function of turning off the light；Brightness control signal is transmitted using rectified wave,
Flicker and the reduction of power factor when not resulting in LED brightness regulation.
Description of the drawings
Fig. 1 is system architecture diagram.
Fig. 2 is Commutation control unit structure chart.
Fig. 3 is controllable rectifier module embodiment circuit diagram.
Fig. 4 is trigger control module embodiment circuit diagram.
Fig. 5 is control section embodiment circuit diagram in Commutation control unit.
Fig. 6 be send brightness degree for brightness 3 brightness control signal when waveform diagram.
Fig. 7 is brightness control signal sending method.
Fig. 8 is LED brightness adjusting unit structure chart.
Fig. 9 is that LED brightness adjusting unit adjusts section Example circuit diagram.
Figure 10 is LED drive module embodiment circuit diagram.
Figure 11 is brightness reception and control method.
Specific embodiment
Below by accompanying drawing and in conjunction with the embodiments the present invention is described in further detail, but embodiments of the present invention
Not limited to this.
Realize the system architecture diagram of the present invention as shown in figure 1, by Commutation control unit and LED brightness adjusting unit group
Into.Commutation control unit is by phase line input terminal L, zero line input terminal N input single-phase 220V AC powers, controllable whole by first
Stream lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 output controlled rectification voltages.LED brightness adjusting unit is by first
Controlled rectification input terminal AC1, the second controlled rectification input terminal AC2 are input into controlled rectification voltage and control LED brightness.
The structure of Commutation control unit as shown in Fig. 2 by control power module, controllable rectifier module, zero passage detection module,
Single chip control module, trigger control module, the given module composition of brightness.
The embodiment of controllable rectifier module as shown in figure 3, by rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2,
Bidirectional thyristor V3, bidirectional thyristor V4 are constituted.2 ac input ends of rectifier bridge UR1 are respectively connecting to phase line input terminal L
With zero line input terminal N, rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification output negative terminal is connected to double
To the second plate of IGCT V4；The first anode of bidirectional thyristor V1 is connected with after the first anode parallel connection of bidirectional thyristor V3
To the first controlled rectification lead-out terminal AC1；The second plate of bidirectional thyristor V1 is connected to phase line input terminal L；Two-way brilliant lock
The second controlled rectification lead-out terminal AC2 is connected to after the first anode of pipe V2 is in parallel with the first anode of bidirectional thyristor V4；It is double
Zero line input terminal N is connected to the second plate of IGCT V2.
The trigger pulse of bidirectional thyristor V1 is input into from its control pole K11 and first anode K12, and bidirectional thyristor V2's touches
Send out pulse to be input into from its control pole K21 and first anode K22, the trigger pulse of bidirectional thyristor V3 is from its control pole K31 and the
One anode K32 is input into, and the trigger pulse of bidirectional thyristor V4 is input into from its control pole K41 and first anode K42.
Rectifier bridge UR1 adopts single-phase rectification bridge stack, or is replaced using 4 diode composition single-phase rectification bridges.
Trigger control module is the circuit for meeting following functions：It is provided with exchange control signal, rectification control signal；Hand over
When the AC controling signal of flow control input input is effective, trigger control module controls bidirectional thyristor V1 and bidirectional thyristor
Triggering and conducting during V2 zero passages；When the AC controling signal of exchange control signal input is invalid, trigger control module control is two-way
End after IGCT V1 and bidirectional thyristor V2 zero passages；When the rectification control signal of rectification control signal input is effective, triggering
Control module controls triggering and conducting when bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；The rectification of rectification control signal input
When control signal is invalid, end after trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passages.
The embodiment of trigger control module is as shown in figure 4, by zero cross fired optocoupler U1-U4 and input current-limiting resistance R1-
R4, output current limiting resistance R5-R8 are constituted, and are provided with exchange control signal KJ, rectification control signal KZ.Zero cross fired optocoupler
The inside of U1-U4 includes input light emitting diode, output optical controlled bidirectional thyrister, and zero-cross triggering circuit.Zero cross fired
The model of optocoupler U1-U4 is selected in MOC3041, MOC3042, MOC3043, MOC3061, MOC3062, MOC3063.
Input current-limiting resistance R1 is connected in parallel to the first direct current after connecting with the input light emitting diode of zero cross fired optocoupler U1 again
Working power VDD1 with exchange control signal KJ.Input current-limiting resistance R1 is connected on the input luminous two of zero cross fired optocoupler U1
Pole pipe anode, as shown in Figure 4；Input current-limiting resistance R1 can also be connected on the input light emitting diode of zero cross fired optocoupler U1
Negative electrode.
Input current-limiting resistance R2 is connected in parallel to the first direct current after connecting with the input light emitting diode of zero cross fired optocoupler U2 again
Working power VDD1 with exchange control signal KJ.The input light emitting diode of input current-limiting resistance R3 and zero cross fired optocoupler U3
It is connected in parallel to the first DC supply VDD1 and rectification control signal KZ after series connection again.Input current-limiting resistance R4 and zero cross fired
The first DC supply VDD1 and rectification control signal KZ is connected in parallel to again after the input light emitting diode series connection of optocoupler U4.It is defeated
Enter the input light-emitting diodes tube anode that current-limiting resistance R2-R4 can be connected on corresponding zero cross fired optocoupler, as shown in Figure 4；Also may be used
To be connected on the input light-emitting diodes tube cathode of corresponding zero cross fired optocoupler.
Output current limiting resistance R5 is connected in parallel to double again after connecting with output optical controlled bidirectional thyrister inside zero cross fired optocoupler U1
To control pole K11 and the first anode K12 of IGCT V1；Export light-operated inside output current limiting resistance R6 and zero cross fired optocoupler U2
It is connected in parallel to control pole K21 and the first anode K22 of bidirectional thyristor V2 after bidirectional thyristor series connection again；Output current limiting resistance R7 with
It is connected in parallel to control pole K31 and the of bidirectional thyristor V3 after exporting optical controlled bidirectional thyrister series connection inside zero cross fired optocoupler U3 again
One anode K32；Output current limiting resistance R8 is connected in parallel to again with exporting inside zero cross fired optocoupler U4 after optical controlled bidirectional thyrister is connected
Control pole K41 of bidirectional thyristor V4 and first anode K42.
In Commutation control unit, control section includes controlling power module, zero passage detection module, single chip control module, bright
The given module of degree, embodiment circuit are as shown in Figure 5.
Control power module input single-phase 220V AC powers, are output as to Commutation control unit the first direct current work for providing
Make power vd D1.In Fig. 5 embodiments, control power module by diode D01, diode D02, diode D03, diode D04,
Electric capacity C1, resistance R01, voltage-stabiliser tube DW01 compositions.Diode D01, diode D02, diode D03, diode D04 composition controls
Power supply single-phase rectification bridge；Electric capacity C1 strobes, and is connected in parallel on the commutating voltage output end of control power supply single-phase rectification bridge；Resistance
R01, voltage-stabiliser tube DW01 constitute mu balanced circuit.First DC supply VDD1 is exported from voltage-stabiliser tube DW01 negative electrodes.Control power supply
The rectification negative polarity end of single-phase rectification bridge is for publicly.
Control power module can also adopt other implementations.Diode D01, diode D02, diode D03, two poles
The control power supply single-phase rectification bridge of pipe D04 compositions can be replaced with single-phase rectification bridge stack, resistance R01, voltage-stabiliser tube DW01 composition
Mu balanced circuit can adopt DC/DC voltage-stablizers or three terminal regulator to replace.
Zero passage detection module is the circuit with following functions：It is provided with zero passage voltage input, zero-crossing pulse output end；Cross
No-voltage input is connected to phase line input terminal L；The zero-crossing pulse of zero-crossing pulse output end output is positive pulse；Zero-crossing pulse
It is corresponding with the single-phase 220V AC powers positive half-wave of Commutation control unit input；The width of zero-crossing pulse is exchanged less than single-phase 220V
Power supply positive half-wave width.
In Fig. 5 embodiments, zero passage detection module is detection shaping circuit, by diode D1, resistance R9, voltage-stabiliser tube DW1 groups
Into.The two ends of resistance R9 are respectively connecting to diode D1 negative electrodes and voltage-stabiliser tube DW1 negative electrodes, and it is defeated that diode D1 anodes are connected to phase line
Enter terminal L, voltage-stabiliser tube DW1 anodes are connected to publicly.Voltage-stabiliser tube DW1 negative electrodes are the zero-crossing pulse output for exporting zero-crossing pulse
End.
The given module of brightness is provided with brightness Setting signal output end, exports brightness Setting signal.In Fig. 5 embodiments, brightness
Given module is BCD rotary encoders, and the brightness Setting signal of output is that BCD encodes 0000-1001, wherein, BCD codings
0001-1001 represents brightness 1-9, when BCD is encoded to 0000, represents brightness 0, extinguishes LED.
The given module of brightness can also carry out partial pressure using potentiometer to the first DC supply VDD1, the brightness for obtaining
Setting signal is the given voltage of brightness.The given average voltage of brightness that potentiometer is exported is divided into n+1 interval, minimum voltage area
Between it is corresponding with the coding 0000 of BCD rotary encoders, the brightness degree of brightness Setting signal is brightness 0；Other intervals respectively with
Brightness 1-n correspondences；N is the integer more than or equal to 2, and representative value is 9.
Single chip control module includes 1 tunnel brightness Setting signal input, 1 road signal acquisition input, 2 road level letters
Number output end.1 tunnel brightness Setting signal input is connected to the brightness Setting signal output end of the given module of brightness；1 tunnel catches
Signal input part is connected to the zero-crossing pulse output end of zero passage detection module, is input into zero-crossing pulse；2 tunnel level signal output ends are
Exchange control output end KJ, rectification control output end KZ, are respectively connecting to exchange control signal KJ of trigger control module, whole
Flow control input KZ.
In Fig. 5 embodiments, single chip control module is made up of single-chip microprocessor MCU 1, crystal oscillator XT1, single-chip microprocessor MCU 1
Model is MSP430G2553.The P1.7-P1.4 of single-chip microprocessor MCU 1 is brightness Setting signal input, the given module of brightness
BCD codings are input into from P1.7-P1.4.If the given module of brightness adopts potentiometer, the analog voltage input of single-chip microprocessor MCU 1
A0 (P1.0) is held for brightness Setting signal input, the output voltage of potentiometer is connected to the analog voltage input of single-chip microprocessor MCU 1
End A0 (P1.0).Single-chip microprocessor MCU 1 is encoded by reading the BCD of P1.7-P1.4 inputs, or to analog voltage input A0
The given voltage of the brightness of input carries out A/D conversions, obtains the brightness degree of brightness Setting signal.The P2.0 of single-chip microprocessor MCU 1 is to catch
Signal input part is caught, the zero-crossing pulse output end of zero passage detection module is connected to.P1.1, P1.2 of single-chip microprocessor MCU 1 is level letter
Number output end, wherein P1.1 are exchange control output end KJ, and P1.2 is rectification control output end KZ；Exchange control output end KJ,
Rectification control output end KZ is respectively connecting to exchange control signal KJ of trigger control module, rectification control signal KZ.
First controlled rectification lead-out terminal AC1 of Commutation control unit, the second controlled rectification lead-out terminal AC2 output is controllable
Commutating voltage, Commutation control unit send different brightness by continuous rectified waveform periodicity in control controlled rectification voltage
The brightness control signal of grade.The virtual value of controlled rectification voltage and the single-phase 220V AC powers of Commutation control unit input
Voltage effective value is identical.
In brightness control signal, brightness degree is represented with continuous rectified waveform periodicity.In embodiment, brilliance control letter
Number total brightness 1-n, common n brightness degree.When the brightness degree of brightness Setting signal is brightness 0, Commutation control unit is closed
LED, does not send brightness control signal.The brightness 1-n of brightness control signal brightness degree and brightness Setting signal brightness degree
Brightness 1-n between correspond.
Cycle in rectified waveform periodicity is power frequency period, and the power frequency period is 20ms；Rectified waveform periodicity is
The quantity of power frequency period shared by rectified waveform；The rectified waveform in 1 cycle is made up of 2 rectified half-waves, first rectified half-waves
Corresponding with single-phase 220V AC powers positive half-wave, second rectified half-waves is corresponding with the negative half-wave of single-phase 220V AC powers.
When Commutation control unit sends brightness control signal, waveform example is as shown in Figure 6.What is sent shown in Fig. 6 is brightness etc.
Brightness control signal of the level for brightness 3.
Single chip control module sends as follows the step of a brightness degree is the brightness control signal of brightness K：
Step 1, enters step 2 when waiting until the rising edge for receiving zero-crossing pulse；
Step 2, stops exchange output, starts rectification output；
Step 3, the zero-crossing pulse rising edge to receiving are counted, and enter step 4 when count value reaches K；
Step 4, stops rectification output, starts exchange output.
Do not close LED, Commutation control unit when normal maintenance does not send brightness control signal state, single-chip microcomputer control
Molding block control exchange control output end KJ output useful signals, rectification control output end KZ output invalid signals, zero cross fired
The input LEDs ON of optocoupler U1 and U2, the input light emitting diode cut-off of zero cross fired optocoupler U3 and U4, two-way crystalline substance
Brake tube V1, bidirectional thyristor V2 are turned on, bidirectional thyristor V3, bidirectional thyristor V4 cut-off, the first controlled rectification lead-out terminal
The controlled rectification voltage of AC1, the second controlled rectification lead-out terminal AC2 output is alternating voltage.In the embodiment shown in fig. 4,
The exchange control output end KJ of single chip control module output, the signal of rectification control output end KZ are Low level effective.
The zero-crossing pulse of the output of zero passage detection module shown in Fig. 5 and the single-phase 220V AC powers of Commutation control unit input
Positive half-wave correspondence, and the width of zero-crossing pulse be less than positive half-wave width.Single chip control module is detected and half-wave 1 in Fig. 6
After corresponding zero-crossing pulse rising edge, into step 2.It is described to stop exchange output, start rectification output, refer to control exchange
Control output end KJ exports invalid signals, stops exchange output；Rectification control output end KZ exports useful signal, starts rectification defeated
Go out；The input light emitting diode cut-off of zero cross fired optocoupler U1 and U2, the input light emitting diode of zero cross fired optocoupler U3 and U4
Conducting.From the next zero crossing of the single-phase 220V AC powers of Commutation control unit input, i.e., zero crossing 2 as shown in Figure 6
Start, bidirectional thyristor V1, bidirectional thyristor V2 cut-off, bidirectional thyristor V3, bidirectional thyristor V4 conducting, the first controlled rectification
The controlled rectification voltage of lead-out terminal AC1, the second controlled rectification lead-out terminal AC2 output is commutating voltage.To the continuous K cycle
Alternating voltage ripple carry out rectification after, single chip control module is counted to the zero-crossing pulse rising edge that receives, and count value reaches K
When, in the embodiment shown in fig. 6, the 3rd zero-crossing pulse counting down to is corresponding with half-wave in Fig. 63, now stops rectification defeated
Go out, start exchange output, then in next zero crossing, i.e., zero crossing 4 as shown in Figure 6 starts, bidirectional thyristor V1, two-way crystalline substance
Brake tube V2 is turned on, bidirectional thyristor V3, bidirectional thyristor V4 cut-off, the first controlled rectification lead-out terminal AC1, the second controlled rectification
The controlled rectification voltage of lead-out terminal AC2 outputs is alternating voltage, and Commutation control unit returns to and normal maintains not sending brightness
Control signal state.
Commutation control unit send brightness control signal method as shown in fig. 7, comprises：
Step A, reads brightness Setting signal；
Step B, judges whether to close LED, is that then LED is closed in control, goes to step D；Step C is gone to otherwise；
Step C, sends a brightness control signal；
Step D, judges whether brightness changes, and brightness changes, return to step B；Brightness does not change, and returns
Return step D.
Judge whether that the method for closing LED is to judge whether the brightness degree of brightness Setting signal is brightness 0；Brightness
Grade closes LED when being brightness 0.Judge that the method whether brightness changes is to judge brightness of brightness Setting signal etc.
Whether level changes.
The method of LED is closed in control, stops rectification output, stops exchange output；Now the first controlled rectification output
Terminal AC1, the second controlled rectification lead-out terminal AC2 do not export controlled rectification voltage.
The structure of LED brightness adjusting unit is as shown in figure 8, adjusted by regulation power supply module, waveform sampling module, single-chip microcomputer
Section module, LED drive module composition.
The adjustment portion of LED brightness adjusting unit point includes that regulation power supply module, waveform sampling module, single-chip microcomputer adjust mould
Block, embodiment are as shown in Figure 9.
Regulation power supply module provides the second DC supply VDD2 for LED brightness adjusting unit.In Fig. 9 embodiments,
Regulation power supply module is by diode D05, diode D06, diode D07, diode D08, electric capacity C2, resistance R02, voltage-stabiliser tube
DW02 is constituted.Diode D05, diode D06, diode D07, diode D08 composition regulation power supply single-phase rectification bridges；Electric capacity C2
The commutating voltage output end of regulation power supply single-phase rectification bridge is connected in parallel on, is strobed；Resistance R02, voltage-stabiliser tube DW02 composition is steady
Volt circuit.Second DC supply VDD2 is exported from voltage-stabiliser tube DW02 negative electrodes.The rectification negative pole of regulation power supply single-phase rectification bridge
Property end be reference ground.
Regulation power supply module can also adopt other implementations.Diode D05, diode D06, diode D07, two poles
The regulation power supply single-phase rectification bridge of pipe D08 compositions can be replaced with single-phase rectification bridge stack, resistance R02, voltage-stabiliser tube DW02 composition
Mu balanced circuit can adopt DC/DC voltage-stablizers or three terminal regulator to replace.
Waveform sampling module is the circuit with following functions：Waveform sampling module is provided with sampling Waveform Input end and sampling
Pulse output end；Sampling Waveform Input end is connected to the first controlled rectification input terminal；Waveform sampling module is controllable whole by first
Stream input terminal current potential is detected higher than the waveform of the second controlled rectification input terminal current potential and amplitude limit obtains sampling pulse；Sampling arteries and veins
The positive pulse of punching is corresponding higher than the waveform of the second controlled rectification input terminal current potential with the first controlled rectification input terminal current potential.
In Fig. 9 embodiments, waveform sampling module is detection shaping circuit, by diode D2, resistance R12, voltage-stabiliser tube DW2 groups
Into.The two ends of resistance R12 are respectively connecting to diode D2 negative electrodes and voltage-stabiliser tube DW2 negative electrodes；Diode D2 anodes are sampling waveform
Input, is connected to the first controlled rectification input terminal AC1；Voltage-stabiliser tube DW2 anodes are connected to reference ground；Voltage-stabiliser tube DW2 negative electrodes
For sampling pulse output end.
Single-chip microcomputer adjustment module has seizure input and pwm pulse output end, catches input and is connected to waveform sampling
The sampling pulse output end of module.In Fig. 9 embodiments, single-chip microcomputer adjustment module is by single-chip microprocessor MCU 2, crystal oscillator XT2 groups
Model into, single-chip microprocessor MCU 2 is MSP430G2553, and the seizure input of single-chip microprocessor MCU 2 is P2.0, and pwm pulse output end is
P1.2。
LED drive module is used for driving LED to light, and is provided with PWM brightness regulated signal inputs, can not adopt transformation
Device is directly accessed 220V AC powers or directly inputs the LED drive module of more than 300V dc sources and may be suitable for
The present invention, is only one of embodiment circuit shown in Figure 10.The PWM brightness regulated signals input of LED drive module connects
It is connected to the pwm pulse output end of single-chip microcomputer adjustment module.
In Figure 10, LED drive module is by LED driver U5, diode D11, diode D12, diode D13, diode
D14, electric capacity C3, electric capacity C4, inductance LG, fast recovery diode D15, switching tube VD, resistance R14, resistance R15 compositions.LED drives
Model HV9910 of device U5.
In Figure 10, diode D11, diode D12, diode D13, diode D14 composition single phase bridge type rectifier circus.It is single
2 ac input ends of phase bridge rectifier are respectively connecting to the first controlled rectification input terminal AC1 and the second controlled rectification
Input terminal AC2, direct current output negative terminal are connected to reference ground, and direct current output anode is connected to electric capacity C3 positive poles, LED driver U5
Power input VIN, one end of inductance LG, fast recovery diode D15 negative electrodes.The ground input GND connections of LED driver U5
To reference ground.Electric capacity C3 negative poles are connected to reference ground.Fast recovery diode D15 anodes be coupled with the drain electrode of switching tube VD after conduct
Positive polarity connection end of the other end of the negative polarity connection end LED- of high-powered LED lamp, inductance LG as high-powered LED lamp
LED+.The LED current test side CS of LED driver U5 is connected to after the source electrode and mono- client links of resistance R14 of switching tube VD；Resistance
The other end of R14 is connected to reference ground.The grid of switching tube VD is connected to the drive end GATE of LED driver U5.Resistance R15's
One end is connected to frequency of oscillation control end RT of LED driver U5, the other end and is connected to reference ground.Electric capacity C4 positive poles are connected to
Control voltage output end VDD of LED driver U5 and linear current control end LD, negative pole are connected to reference ground.LED driver U5
Enable control end PWM_D be PWM brightness regulated signal inputs.LED is connected to positive polarity connection end LED+ and negative polarity
Connection end LED-.
LED brightness adjusting unit receives brightness control signal adjusting brightness of LED lamps, and its method as shown in figure 11, is wrapped
Include：
Step one, initialization set the original intensity grade of LED；
Step 2, adjusts LED luminance；
Step 3, determines whether brightness control signal；Without brightness control signal, return to step three；There is brilliance control
Signal, goes to step 4；
Step 4, receives brightness control signal；
Step 5, return to step two.
The original intensity grade of LED can be set as one in n brightness degree, for example, setting original intensity etc.
Level is grade 1.
The method for adjusting LED luminance is that single-chip microcomputer adjustment module is according to the brightness degree meter of LED for setting or receive
PWM value is calculated, corresponding pwm pulse is sent.
Determine whether brightness control signal, method is for judging from the first controlled rectification input terminal AC1, second controllable whole
Whether the controlled rectification voltage of stream input terminal AC2 inputs is commutating voltage.
Brightness control signal is received, method is to judge continuous rectified waveform periodicity in controlled rectification voltage；It is controllable whole
When having continuous K cycle rectified waveform in stream voltage, the brightness degree of brightness control signal is brightness K.
The function of waveform sampling module is to carry out detection shaping to controlled rectification voltage.In Fig. 9 embodiments, waveform sampling mould
The sampling Waveform Input end of block is connected to the first controlled rectification input terminal AC1, by the first controlled rectification input terminal AC1 current potentials
Simultaneously amplitude limit obtains sampling pulse for waveform detection higher than the second controlled rectification input terminal AC2.Brightness etc. in brightness control signal
Level is shown in first sampling pulse example such as Fig. 6 (b) of brightness 3.When controlled rectification voltage is alternating voltage, sampling pulse is
Dutycycle less than 50%, and alternating voltage same frequency square wave；When controlled rectification voltage is commutating voltage, sampling pulse is
Dutycycle is close to the square wave that 100%, frequency is 2 times of alternating current voltage frequency.In Fig. 6 (b), the rectified waveform in continuous 3 cycles
Occur 6 narrow negative pulses such as pulse 5-10 in making sampling pulse, when alternating current voltage frequency is power frequency 50Hz, the week of narrow negative pulse
Phase is 10ms；Narrow negative pulse width is less than 1ms, concrete width and resistance R12, voltage-stabiliser tube DW2 and controlled rectification voltage
The parameters such as amplitude are related.
The sampling Waveform Input end of waveform sampling module can also be connected to the second controlled rectification input terminal AC2, waveform
Waveform of the sampling module by the first controlled rectification input terminal AC1 current potentials less than the second controlled rectification input terminal AC2 is detected simultaneously
Amplitude limit obtains sampling pulse, exports to the seizure input of single-chip microcomputer adjustment module；Now, brightness degree in brightness control signal
Shown in sampling pulse example such as Fig. 6 (c) of brightness 3；When controlled rectification voltage is alternating voltage, sampling pulse is dutycycle
Less than 50%, and alternating voltage same frequency square wave；When controlled rectification voltage is commutating voltage, sampling pulse is low electricity
Flat, in Fig. 6 (c), there is low level pulse of the width slightly larger than 70ms in the rectified waveform in continuous 3 cycles in making sampling pulse,
That is pulse 11.
The method for judging continuous rectified waveform periodicity in controlled rectification voltage is：Single-chip microcomputer adjustment module is to sampling arteries and veins
The narrow negative pulse number rushed in the square wave that medium frequency is 2 times of alternating current voltage frequency is counted, when count value is 2K, controllable whole
In stream voltage, continuous rectified waveform periodicity is K；Or single-chip microcomputer adjustment module is to low more than 20ms in sampling pulse
Level pulse measures width, if the low level pulse width more than 20ms that measurement is obtained is T, then continuous in controlled rectification voltage
Rectified waveform periodicity be K=INT (T/20), the function of INT functions is that fractions omitted part rounds.
Controlled rectification voltage is to the regulation power supply module of LED brightness adjusting unit, LED drive module and waveform sampling mould
Block is directly powered, and regulation power supply module therein, LED drive module carry out rectification, then Jing electric capacity first to controlled rectification voltage
After filtering, power supply is provided to interlock circuit；When controlled rectification voltage is zero, regulation power supply module, the power supply electricity of LED drive module
Stream is also zero；Waveform sampling module is loaded for non-linear resistive, when controlled rectification voltage is zero, the power supply of waveform sampling module
Electric current is zero.Therefore, when controlled rectification voltage is zero, which is zero to the source current that LED brightness adjusting unit is provided.Institute
With, Commutation control unit is carried out stopping exchange output, starts rectification output in the zero crossing of the single-phase 220V AC powers of input,
Or when being off rectification output, starting to exchange the switching of output, bidirectional thyristor V1, bidirectional thyristor V2 and bidirectional thyristor
Between V3, bidirectional thyristor V4 can the successful change of current, power supply short circuit will not be caused.
The present invention has following features：
1. power line far distance controlled LED brightness is adopted, without the need for remote control, without the need for control line；
2. LED brightness can be divided into multiple grades as needed, with function of turning off the light；
3. brightness control signal is transmitted using rectified wave, flicker and power factor when not resulting in LED brightness regulation
Reduction.
Claims (9)
1. a kind of controlled rectification remote LED lamp light adjusting circuit, it is characterised in that：
It is made up of Commutation control unit and LED brightness adjusting unit；
The Commutation control unit be provided with phase line input terminal, zero line input terminal, the first controlled rectification lead-out terminal, second can
Control rectification output end；The phase line input terminal, zero line input terminal input single-phase 220V AC powers；Described first is controllable
Rectification output end, the second controlled rectification lead-out terminal output controlled rectification voltage；
The LED brightness adjusting unit is provided with the first controlled rectification input terminal, the second controlled rectification input terminal, and described
The first controlled rectification that one controlled rectification input terminal, the second controlled rectification input terminal are respectively connecting to Commutation control unit is defeated
Go out terminal, the second controlled rectification lead-out terminal；
The Commutation control unit by control power module, controllable rectifier module, zero passage detection module, single chip control module,
Trigger control module, the given module composition of brightness；
The control power module exports the first direct current work by power supply single-phase rectification bridge is controlled and the first filter regulator circuit is constituted
Make power supply；Two ac input ends of the control power supply single-phase rectification bridge are respectively connecting to phase line input terminal, zero line input
Terminal；The rectification negative polarity end for controlling power supply single-phase rectification bridge is for publicly；First DC supply is to monolithic
Machine control module is powered；
The controllable rectifier module is by rectifier bridge UR1, bidirectional thyristor V1, bidirectional thyristor V2, bidirectional thyristor V3, two-way crystalline substance
Brake tube V4 is constituted；2 ac input ends of the rectifier bridge UR1 are respectively connecting to phase line input terminal and zero line input terminal,
Rectification output plus terminal is connected to the second plate of bidirectional thyristor V3, and rectification output negative terminal is connected to the second of bidirectional thyristor V4
Anode；The first controlled rectification is connected to after the first anode of bidirectional thyristor V1 is in parallel with the first anode of bidirectional thyristor V3 defeated
Go out terminal；The second plate of bidirectional thyristor V1 is connected to phase line input terminal；The first anode of bidirectional thyristor V2 with it is two-way
The second controlled rectification lead-out terminal is connected to after the first anode parallel connection of IGCT V4；The second plate connection of bidirectional thyristor V2
To zero line input terminal；
The trigger control module is provided with exchange control signal, rectification control signal；The exchange control signal input
AC controling signal it is effective when, trigger control module control bidirectional thyristor V1 and triggering is led during bidirectional thyristor V2 zero passages
It is logical；It is described exchange control signal input AC controling signal it is invalid when, trigger control module control bidirectional thyristor V1 and
End after bidirectional thyristor V2 zero passages；When the rectification control signal of the rectification control signal input is effective, triggering control mould
Block controls triggering and conducting when bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；The rectification control of the rectification control signal input
During invalidating signal processed, end after trigger control module control bidirectional thyristor V3 and bidirectional thyristor V4 zero passages；
The zero passage detection module is provided with zero passage voltage input, zero-crossing pulse output end；The zero passage voltage input connection
To phase line input terminal；The zero-crossing pulse of the zero-crossing pulse output end output is positive pulse；The zero-crossing pulse with it is single-phase
220V AC powers positive half-wave correspondence；The width of the zero-crossing pulse is less than single-phase 220V AC powers positive half-wave width；
The given module of the brightness is provided with brightness Setting signal output end；
It is defeated that the single chip control module includes brightness Setting signal input, signal acquisition input and two-way level signal
Go out end；The brightness Setting signal input is connected to the brightness Setting signal output end of the given module of brightness；It is described to catch letter
Number input is connected to the zero-crossing pulse output end of zero passage detection module；The two-way level signal output end respectively exchanges control
Output end processed, rectification control output end；The exchange control output end, rectification control output end are respectively connecting to triggering control mould
The exchange control signal of block, rectification control signal；
The LED brightness adjusting unit drives mould by regulation power supply module, waveform sampling module, single-chip microcomputer adjustment module, LED
Block is constituted；
The regulation power supply module input controlled rectification voltage, the second DC supply of output, by regulation power supply single-phase rectifier
Bridge and the second filter regulator circuit composition；The rectification negative polarity end of the regulation power supply single-phase rectification bridge is reference ground；The tune
Economize on electricity source module is powered to single-chip microcomputer adjustment module；
The waveform sampling module is provided with sampling Waveform Input end and sampling pulse output end；Sampling Waveform Input end connection
To the first controlled rectification input terminal；The waveform sampling module will be the first controlled rectification input terminal current potential controllable higher than second
Simultaneously amplitude limit obtains sampling pulse for the waveform detection of rectification input terminal current potential；The positive pulse of the sampling pulse is controllable with first whole
Stream input terminal current potential is corresponding higher than the waveform of the second controlled rectification input terminal current potential；
The single-chip microcomputer adjustment module has seizure input and pwm pulse output end, catches input and is connected to waveform sampling
The sampling pulse output end of module；
The LED drive module is used for driving LED to light, and is provided with PWM brightness regulated signal inputs；The PWM brightness is adjusted
Section signal input part is connected to the pwm pulse output end of single-chip microcomputer adjustment module；
The Commutation control unit sends different brightness by continuous rectified waveform periodicity in control controlled rectification voltage
The brightness control signal of grade；
In the brightness control signal, brightness degree is represented with continuous rectified waveform periodicity；
The LED brightness adjusting unit receives brightness control signal adjusting brightness of LED lamps in controlled rectification voltage.
2. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The control power supply
Module is made up of diode D01, diode D02, diode D03, diode D04, electric capacity C1, resistance R01, voltage-stabiliser tube DW01；
Diode D01, diode D02, diode D03, diode D04 composition control power supply single-phase rectification bridges；Electric capacity C1 is connected in parallel on control
The DC voltage output end of power supply single-phase rectification bridge processed；Resistance R01, voltage-stabiliser tube DW01 constitute mu balanced circuit；First direct current
Working power is exported from voltage-stabiliser tube DW01 negative electrodes.
3. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The regulation power supply
Module is made up of diode D05, diode D06, diode D07, diode D08, electric capacity C2, resistance R02, voltage-stabiliser tube DW02；
Diode D05, diode D06, diode D07, diode D08 composition regulation power supply single-phase rectification bridges；Electric capacity C2 is connected in parallel on tune
The DC voltage output end of economize on electricity source single-phase rectification bridge；Resistance R02, voltage-stabiliser tube DW02 constitute mu balanced circuit；Second direct current
Working power is exported from voltage-stabiliser tube DW02 negative electrodes.
4. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The triggering control
Module is by zero cross fired optocoupler U1, zero cross fired optocoupler U2, zero cross fired optocoupler U3, zero cross fired optocoupler U4, input current limliting electricity
Resistance R1, input current-limiting resistance R2, input current-limiting resistance R3, input current-limiting resistance R4, output current limiting resistance R5, output current limiting resistance
R6, output current limiting resistance R7, output current limiting resistance R8 compositions, are provided with exchange control signal, rectification control signal；
The zero cross fired optocoupler U1, zero cross fired optocoupler U2, zero cross fired optocoupler U3, the inside of zero cross fired optocoupler U4 include
There are input light emitting diode and output optical controlled bidirectional thyrister；
The input current-limiting resistance R1 is connected in parallel to the first direct current after connecting with the input light emitting diode of zero cross fired optocoupler U1 again
Working power with exchange control signal；After input current-limiting resistance R2 is connected with the input light emitting diode of zero cross fired optocoupler U2
The first DC supply is connected in parallel to again and exchanges control signal；The input of input current-limiting resistance R3 and zero cross fired optocoupler U3
The first DC supply and rectification control signal is connected in parallel to again after light emitting diode series connection；Input current-limiting resistance R4 and zero passage
The first DC supply and rectification control signal is connected in parallel to again after the input light emitting diode series connection of triggering optocoupler U4；
The output current limiting resistance R5 is connected in parallel to double again after connecting with output optical controlled bidirectional thyrister inside zero cross fired optocoupler U1
To control pole and the first anode of IGCT V1；Light-operated two-way crystalline substance is exported inside output current limiting resistance R6 and zero cross fired optocoupler U2
It is connected in parallel to control pole and the first anode of bidirectional thyristor V2 after brake tube series connection again；Output current limiting resistance R7 and zero cross fired optocoupler
It is connected in parallel to control pole and the first anode of bidirectional thyristor V3 after exporting optical controlled bidirectional thyrister series connection inside U3 again；Output current limiting
Resistance R8 is connected in parallel to the control of bidirectional thyristor V4 again with exporting inside zero cross fired optocoupler U4 after optical controlled bidirectional thyrister is connected
Pole and the first anode.
5. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The zero passage detection
Module is made up of diode D1, resistance R9, voltage-stabiliser tube DW1, is provided with zero passage voltage input, zero-crossing pulse output end；Resistance R9
Two ends be respectively connecting to diode D1 negative electrodes and voltage-stabiliser tube DW1 negative electrodes；Diode D1 anodes are zero passage voltage input, are connected
To phase line input terminal；Voltage-stabiliser tube DW1 anodes are connected to publicly；Voltage-stabiliser tube DW1 negative electrodes are zero-crossing pulse output end.
6. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The waveform sampling
Module is provided with sampling Waveform Input end and sampling pulse output end, is made up of diode D2, resistance R12, voltage-stabiliser tube DW2；Resistance
The two ends of R12 are respectively connecting to diode D2 negative electrodes and voltage-stabiliser tube DW2 negative electrodes；Diode D2 anodes are sampling Waveform Input end,
It is connected to the first controlled rectification input terminal；Voltage-stabiliser tube DW2 anodes are connected to reference ground；Voltage-stabiliser tube DW2 negative electrodes are sampling pulse
Output end.
7. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The brightness gives
Module is BCD rotary encoders, and the brightness Setting signal is that BCD is encoded.
8. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The single-chip microcomputer control
Molding block is made up of single-chip microprocessor MCU 1, crystal oscillator XT1；The model of the single-chip microprocessor MCU 1 is MSP430G2553.
9. controlled rectification remote LED lamp light adjusting circuit according to claim 1, it is characterised in that：The single-chip microcomputer is adjusted
Section module is made up of single-chip microprocessor MCU 2, crystal oscillator XT2；The model of the single-chip microprocessor MCU 2 is MSP430G2553.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5821704A (en) * | 1995-04-28 | 1998-10-13 | The Genlyte Group Incorporated | Single wire, multiple phase remote dimming system |
| CN103079319A (en) * | 2013-01-24 | 2013-05-01 | 福建侨汇电子科技有限公司 | Single-wire-system radio-frequency light modulator based on microcontroller |
| CN103281849A (en) * | 2013-06-26 | 2013-09-04 | 湖南工业大学 | Light-adjusting device and method of LED illuminating lamp |
| CN103296903A (en) * | 2013-05-29 | 2013-09-11 | 西安建筑科技大学 | Direct-current silicon commutating power supply |
-
2015
- 2015-07-06 CN CN201510387103.2A patent/CN104968114B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5821704A (en) * | 1995-04-28 | 1998-10-13 | The Genlyte Group Incorporated | Single wire, multiple phase remote dimming system |
| CN103079319A (en) * | 2013-01-24 | 2013-05-01 | 福建侨汇电子科技有限公司 | Single-wire-system radio-frequency light modulator based on microcontroller |
| CN103296903A (en) * | 2013-05-29 | 2013-09-11 | 西安建筑科技大学 | Direct-current silicon commutating power supply |
| CN103281849A (en) * | 2013-06-26 | 2013-09-04 | 湖南工业大学 | Light-adjusting device and method of LED illuminating lamp |
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